A5029442925- CCD and CMOS Imaging Sensors
- Gamma-ray bursts and supernovae
- Calibration and Measurement Techniques
- Astrophysical Phenomena and Observations
- Adaptive optics and wavefront sensing
- Orthopaedic implants and arthroplasty
- Particle Detector Development and Performance
- Stellar, planetary, and galactic studies
- Total Knee Arthroplasty Outcomes
- Astronomy and Astrophysical Research
- Advanced X-ray and CT Imaging
- Orthopedic Infections and Treatments
- Astronomical Observations and Instrumentation
- Infrared Target Detection Methodologies
- Astro and Planetary Science
- Solar and Space Plasma Dynamics
- Spacecraft Design and Technology
- X-ray Spectroscopy and Fluorescence Analysis
- Medical Imaging Techniques and Applications
- Spacecraft and Cryogenic Technologies
- Astrophysics and Cosmic Phenomena
- Photocathodes and Microchannel Plates
- Astrophysics and Star Formation Studies
- Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
- Advanced X-ray Imaging Techniques
University of Oxford
2003-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2023
European Space Research and Technology Centre
2004-2020
University of Leicester
1994-2006
Nuffield Orthopaedic Centre
2003-2006
European Space Agency
2006
Pennsylvania State University
2003
Brera Astronomical Observatory
2003
University of Cambridge
1974-1996
Bridge University
1974
The EPIC focal plane imaging spectrometers on XMM-Newton use CCDs to record the images and spectra of celestial X-ray sources focused by three mirrors. There is one camera at focus each mirror; two cameras contain seven MOS CCDs, while third uses twelve PN defining a circular field view 30′ diameter in case. were specially developed for EPIC, combine high quality with spectral resolution close Fano limit. A filter wheel carrying kinds transparent light blocking filter, fully closed, open...
The <i>Swift</i> X-ray Telescope (XRT) is designed to make astrometric, spectroscopic, and photometric observations of emission from Gamma-ray Bursts their afterglows in the energy band 0.2-10 keV. In order provide rapid-response, automated these randomly occurring objects without ground intervention, XRT must be able observe covering some seven orders magnitude flux, extracting maximum possible science each one. This requires a variety readout modes optimise information collected response...
Polyethylene particulate wear debris continues to be implicated in the aetiology of aseptic loosening following knee arthroplasty. The Oxford unicompartmental arthroplasty employs a spherical femoral component and fully congruous meniscal bearing increase contact area theoretically reduce potential for polyethylene wear. This study measures vivo ten-year linear device, using roentgenstereophotogrammetric technique. In this study, seven medial prostheses, which had been implanted ten years...
The Swift Gamma-Ray Explorer is designed to make prompt multiwavelength observations of Bursts (GRBs) and GRB Afterglows. X-ray Telescope (XRT) provides key capabilities that permit determine positions with a few arcseconds accuracy within 100 seconds the burst onset. <i>XRT</i> utilizes superb mirror set built for <i>JET-X</i> state-of-the-art <i>XMM/EPIC MOS</i> CCD detector provide sensitive broad-band (0.2-10 keV) imager effective area 135 cm<sup>2</sup> at 1.5 keV, field view 23.6 x...
The <i>SWIFT</i> X-ray Telescope (XRT) is designed to make astrometric, spectroscopic and photometric observations of the emission from Gamma-ray bursts their afterglows, in energy band 0.2 - 10 keV. Here we report results analysis XRT Point Spread Function (PSF) as measured during end-to-end calibration campaign at Panter X-Ray beam line facility. comprises study PSF both on-axis off-axis. We compare laboratory with expectations ray-tracing software mirror module tested a single unit. show...
In June 2012, Euclid, ESA's Cosmology mission was approved for implementation. Afterwards the industrial contracts were signed payload module and spacecraft prime, requirements consolidated. We present status of in light design solutions adopted by contractors. The performances its operation, telescope assembly, scientific instruments as well data-processing have been carefully budgeted to meet demanding requirements. give an overview system where necessary key items interfaces between subsystems.
Emission times of proton-induced traps and optical spot profiles have been measured at temperatures around -110/spl deg/C for large format charge-coupled devices (CCDs), representative those to be used the Gaia mission. There are least seven trap species involved, with emission in range 0.3 /spl mu/s 130 s there is evidence charge re-trapping by fast traps. Trap filling using a injection gate discussed.
Current optical space telescopes rely upon silicon charge-coupled devices (CCDs) to detect and image the incoming photons. The performance of a CCD detector depends on its ability transfer electrons through efficiently, so that signal from every pixel may be read out single amplifier. This process electron is highly susceptible effects solar proton damage (or non-ionizing radiation damage). because charged particles passing displace atoms, introducing energy levels into semiconductor band...
PLATO is a candidate mission for an European Space Agency M-class launch opportunity. The project aims to detect exo-planets from their transits across host stars and characterise those by studying oscillations, hence the name for, PLAnetary Transits Oscillations of stars. In order achieve this aim proposes fly satellite with focal plane up 34 mini-telescopes, each containing 4 large area back illuminated Charge-Coupled Devices (CCDs) provide ultra high precision photometry. If successful,...
The European Space Agency's Gaia mission1 is scheduled for launch in 2012. It will operate at L2 5 years, rotating slowly so that its two optical telescopes repeatedly observe more than one billion stars. resulting data set be iteratively reduced to solve the relative position, parallax-distance and proper motion of every observed star, yielding a three dimensional dynamical model our galaxy. focal plane contains 106 large area silicon CCDs continuously operating TDI mode line rate...
The radiation environment at L2 is of great importance to the science instruments Gaia. Especially non-ionising damage CCDs and resulting increase in charge transfer inefficiency will ultimately limit achievable performance. With its launch December 2013 for a nominal mission 5 years Gaia continuously collecting invaluable information effects on 106 FPA from analysis data dedicated calibration procedures. paper shows first results discusses detected irradiation background with respect...
ESA's Gaia astrometry mission is due for launch in 2011. The astrometric instrument focal plane will have an area of up to 0.5m<sup>2</sup> and contain more than 100 CCDs. These be operated Time Delay Integration mode order track observe sources whilst the telescopes continuously scan sky. Gaia's target precision a few millionths arc second, places extreme demands on thermo--mechanical stability electronics performance. CCDs themselves are large area, back illuminated, full--frame, four...
The Euclid mission, of which the spacecraft is essential space segment, being developed to undertake challenges mapping dark energy and matter distribution in Universe. As launch date approaching (2nd half 2022), development has successfully passed critical milestones with manufacturing integration telescope, instruments service module. Each sub-element been qualified their performance assessed. assembly complete payload currently on-going. integrated optical end module assessed based on...
Molecular contamination is a well-known problem in space flight. Water the most common contaminant and alters numerous properties of cryogenic optical system. Too much ice means that Euclid's calibration requirements science goals cannot be met. Euclid must then thermally decontaminated, long risky process. We need to understand how iced optics affect data when decontamination required. This essential build adequate survey plans, yet comprehensive analysis context an astrophysical has not...